今天给大家分享的�?/span>2015平�/span>8月份〉�/span>RSC Advances》上发表的一篇名为：L-asparagine-assisted synthesis of flower-like -Bi2O3 and its photocatalytic performance for degradation of 4-phenylphenol under visible-light irradiation

文章摘要如下９�/span>

Synthesis of nanosized尽�/span>-Bi2O3 on a large-scale is a great challenge due to its metastable state. A facile L-asparagine-assisted reflux-calcination route was successfully developed for the large-scale preparation of尽�/span>-Bi2O3 micro/nanostructures under mild conditions (low temperature, atmospheric pressure, and wide temperature window). The composition, phase structure, morphology, surface area, and photoabsorption properties of as-synthesized尽�/span>-Bi2O3 and its precursor were systematically characterized. The phase transformation conditions and possible formation mechanism of flower-like尽�/span>-Bi2O3 were discussed. It is found that with a simple reflux process at 100掲�/span>C under atmospheric pressure, uniform monodisperse bismuth-asparagine complex microspheres with average diameters of ~500 nm were produced, then flower-like尽�/span>-Bi2O3 micro/nanostructures were conveniently obtained after calcining the precursor at temperatures ranging from 340 to 420掲�/span>C. A surface CO32- coordination effect introduced from L-asparagine was explained the formation of stabilized尽�/span>-Bi2O3 at low temperature (up to 420掲�/span>C). The as-synthesized尽�/span>-Bi2O3 shows excellent photocatalytic activity toward the degradation of 4-phenylphenol under visible-light irradiation, which is 3.7 and 21.4 times faster than the removal rates of尽�/span>-Bi2O3 nanospheres and a commercial尽�/span>-Bi2O3, respectively, and allows for the elimination of 93.2% total organic carbon after 60 min of irradiation. In addition, the photogenerated reactive species were identified by radical scavenger experiments and electron paramagnetic resonance spectroscopy, then a possible visible-light-induced photocatalytic mechanisms was proposed.

该文章中材料表征采用的是美国麦克仪器ASAP 2460

详情可参考下面链接：

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